60666665 has 4 divisors (see below), whose sum is σ = 72800004. Its totient is φ = 48533328.

The previous prime is 60666653. The next prime is 60666667. The reversal of 60666665 is 56666606.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56666606 = 2 ⋅28333303.

It can be written as a sum of positive squares in 2 ways, for example, as 16736281 + 43930384 = 4091^2 + 6628^2 .

It is a cyclic number.

It is not a de Polignac number, because 60666665 - 2⁸ = 60666409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60666667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6066662 + ... + 6066671.

It is an arithmetic number, because the mean of its divisors is an integer number (18200001).

Almost surely, 2^60666665 is an apocalyptic number.

It is an amenable number.

60666665 is a deficient number, since it is larger than the sum of its proper divisors (12133339).

60666665 is a wasteful number, since it uses less digits than its factorization.

60666665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12133338.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 60666665 is about 7788.8808567085. The cubic root of 60666665 is about 392.9313742138.

The spelling of 60666665 in words is "sixty million, six hundred sixty-six thousand, six hundred sixty-five".